Shares in Blackberry-maker Research In Motion jumped 19% after it unveiled strong results and said reaction to its latest model had been "exceptional".

The Canadian firm said its second quarter net profits had increased by 27% to $140.8m (£75m) from $111m for the same period in 2005.

Research In Motion, which has released its new Pearl model in the US, saw revenues rise 34% to $659m.

It added it may have to restate some results due to an accounting error.

'Awesome'

The company said it had probably over-stated earnings since 1998 by some $25m due to mistakes reporting staff stock options.

Despite the admission, shares in the firm soared 19% in Thursday after-hours trading on New York's Nasdaq exchange, as investors instead focused on the strong results for its second quarter to 2 September.

Peter Misek, an analyst at Canaccord Adams in Toronto, said the quarterly results were "awesome."

"They just smashed the numbers, smashed them," he said.

The new Blackberry Pearl adds music and camera functions to the existing model's email capabilities.